Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This legendary city has been a tourist attraction for centuries.

This church is dedicated to the patron saint of seafarers.

The historic building has preserved human organs, unusual hexagrams, and scars from a political assassination.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

This post-Ottoman era church in Athens was built by locals to serve the residents of Anafiotica

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

Gladiators once walked this ancient, subterranean passage.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The ruined doorway is a portal to the building's turbulent and torturous past.

Large collection from the 3rd millennium BCE.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A sharp sculpture made of thousands of pieces of jagged glass.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.